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GCMS blank analysis results, February 2002

Machine-extracted title · confidence 90%

Laboratory blank report confirming no detectable contamination for nitrosamines and chlorinated solvents during the run.

NYC-WTC_000016078–000016086

Folder label: “GCMS X 12/26/01 A 1/15-1/16/02

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NYC 9/11 Public Portal Document

LSC Area Percent Report

Data File : C:\HPCHEM\1\DATA\JAN1502\LB.D Vial: 4 Acq On : 15 Jan 2002 12:52 pm Operator: 209 GALOS Sample : gc/ms scan 12/26 Inst : GC/MS 209 Mise Multiplr: 1.00 MS Integration Params: LSCINT.P

Method : C:\HPCHEM\1\METHODS\GCMS1126.M (RTE Integrator) Title : 209 625/TCLP calibration table Smoothing : OFF Filtering: 5 Sampling : 1 Min Area: 1 % of largest Peak Start Thrs: 0.2 Max Peaks: 100 Stop Thrs : 0 Peak Location: TOP

If leading or trailing edge < 100 prefer < Baseline drop else tangent > Peak separation: 5

Signal : TIC

peak R.T. first max last PK peak peak peak % of # min scan scan scan TY height area % max. total

1 7.443 257 261 298 rVB 353567 1091558 20.27% 4.069% 2 9.683 504 505 507 rBV 102981 57964 1.08% 0.216% 3 11.501 698 703 723 rBV 1597248 4194733 77.91% 15.636% 4 15.091 1089 1094 1114 rBV 2545972 5281774 98.10% 19.688% 5 20.360 1662 1668 1688 rBV 2666039 5383886 100.00% 20.069%

6 24.776 2142 2149 2159 rBV2 2198773 4784491 88.87% 17.834% 7 29.853 2697 2702 2710 rBV 311693 581889 10.81% 2.169% 8 32.799 3017 3023 3044 rBV2 1426711 3221735 59.84% 12.009% 9 36.866 3458 3466 3483 rBV2 786305 2229346 41.41% 8.310%

Sum of corrected areas: 26827376

LB.D GCMS1126.M Mon Feb 04 15:12:18 2002

$

NYC-WTC_000016082

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NYC-WTC_000016082Source: NYC Law Department, mirrored locally

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GCMS blank analysis report, Feb 2002 · Box DEP Box 12

NYC-WTC_000005159

Blank sample analysis report confirming no contamination above method detection limits for target compounds analyzed on February 1, 2002.

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